This GR86 is all about a clean, focused sound upgrade — ISR Performance catback fitted to a 2023 chassis. The stock intake and chassis balance are untouched, so the car keeps its playful, balanced personality while gaining a bark that wakes the neighborhood without being obnoxious. It’s the kind of subtle change that makes every drive more engaging: sharper throttle response, a slightly deeper midrange, and a satisfying tone at cruise. Perfect for someone who wants character without losing the factory feel.